alsdoef



(No Model.) 2 Sheets-Sheet 1.

W. o. ALSDORP.

-MBGBANIGAL'GARING PoR AH01'STINGDEVICES, tw. No. 305,877.. f PatentedSept. 30, 1884.

1! EL mf f kt z is Nv PETERS. Pham-umgmvher. wzmwgm". uc.

(No Model.) 2 Sheets-Sheet 2,'

W. C. ALSDORF.

MECHANICAL GEA'EINC ECE HCISTINC DEVICES, am. Y No. 305,877. PatentedSept. 30, 1884A.

.diff/rn cys N. PETERS. Pimluthugnpher. wnminglm o. C.

WILLinM c. Ansporn?, on Sr. LOUIS, MISSOURI.

MECHANICAL GEARING FR HOISTING DEVICES, 80G.

SPECIFICATION forming part of Letters P atent No. 305,877, datedSeptember 30, 1884. Application filed January 3, 16E-l. (No model.)

lb all whom 4it may concern.-

Be it known that I, VILLIAM C'. ALsDoRF, a citizen of the United States,residing at St. Louis, in the eountyot' St. Louis and State of Missouri,have invented certain new and useful Improvements in, Mechanical Gearingfor Hoisiing Devices, Ste.; and l do declare the following to he a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to Ina-ke andA use thesaine, reference being had to the accompanying drawings, and to lettersor figures of reference marked thereon, which form a part of thisspecilication.

Figure l of the drawings is a side view. Fig. 2 is a plan view. Fig. 3is a detail View. Fig. 4 is a detail view, and Fig. 5 is a sectionaldetail view ofthe shaft l and its clutchmechanisin.

This invention has relation to mechanical gearing for elevators andhoisting apparatus; and it consists in the construction and novelarrangementof devices, as hereinafter set forth, and pointed out intheappended claims.

ln the accompanying drawings I have illustrated Iny invention in itsapplication to a beltgeared elevator.

The letter Z indicates the driving-belt, moving continuously in the samedirection.

Upon the shaft A is secured the fast pulley' B. C is a loose-gearedpulley on `said shaft, having a pinion, a, and Dis an idler-pulleybetween the pulleys B and C. The belt Z is designed to be shiftedonlhese pulleys. Orr the shaft A is rigidly secured the pinion b.

On a-parallel shaft, E, is keyed the spurwheel F, which engagesV thepinion b, and a spur-wheel, G, which is designed to engage a spur-wheel,H, which is loose on a third shaft, l. The shaft E, acting through thegear F or G and the gearing J JQ turns the shaft L, which carries thelarge drum on which the cable is wound. By means of a belt-shiftinglever, c, pivoted on a fulcrum-bearing, fr, operated by a moving nut, d,on a threaded part of a shaft, M, carrying a spur-wheel, N, the

belt Z maybe shifted. When the belt is shifted from the fast pulley B tothe loose-geared pnlley C, the direction of revolution of the shaft Aremains unchanged; but as the pulley C is turned it is apparent that bythe engagement of its pinion a. with the loose spur-wheel H, in

gear with the driving spur-wheel G of theV shaft E, the motion of theshaft E and its gearing is reversed. ruiming the cableA in the oppositedirection. abled by simply shifting the belt to reverse -the gearing andthe movement of the cable.

VOn the brake-shaft M is keyed fast an eccentric, P, engaging the arm eof the brake R, which is provided with springs S. Thearm e of this brakeworks in a box, g, whereby it is prevented from revolving. When thecheckline V is pulled, turning the shaft M, the eccentric is turned,putting on the brake, and at the same time the shifter is operated tomove the belt over upon the idler-pulley; or, when the `belt is on theloose geared pulley and the shifter is moved to throw the belt over onthe idler. the springs of the brake will give, allowing theeccentrictorevolve one-half turn more.

T representsa pulley which is equal in width to the three pulleys B, C.and D,and isjournaled toa lever-arm, h, pivotedl at la and provided witha bearing, d. The pulley T is designed to lie upon the running belt,revolving with the motion thereof'. Il' the belt should break, thepulley T will fall, and its arm will, by its end bearing, Z, intersectthe counter-shaft I, and at thesarne time will move the looseclutchcollar Z to engage the tight clutch-collar m, which operates thecog-wheel N, and thereby turns the cog-wheel p and the brake shalt towhich the cog-wheel p is keyed, throwing the belt and put-ting on thebrake at the same time.

W indicates a pulley on the lever s', which In this manner I am eniscontinuously held up by the strain of the while descending, causing thecable to becomel slack, the machinery will be instantly stopped ,by thefall of the pulley Vand its lever,which, l intersecting the shaft I,causes the loose clutchcolla-r t to engage the clutch-collar n, turningthe wheels n and p and automatically putting on the -bralre and shiftingthe belt, as before described.

In order to operate the shifter and brake automatically when theelevator-platform is at its highest or' lowest point, the shaft E isthreaded on each side ol' a chain-wheel, U, as indicated at a n, toengage the loose clutchcollars is moved upto engage the clutch-col laron the same side of the chain-wheel, turning the latter and operatingthe chain J ,which turns the chain-wheel U on the brake-shaft M,throwing the shifter and operating the brake.

Having described this invention, what I claim, and desire to secure byLetters Patent,

l. The pulley T, as wide as the belt-pulleys B, C, and D, and having alever-arm adapted to operate a loose clutch-collar on a countershaft,'incombination with a tight clutch-collar and a spur-wheel engaging aspur-wheel on the brake-shaft, and adapted to turn the latter,substantially as specified.

2. The pulley WV, held up by the strain of the cable, and having alever-arm adapted to y operate a loose clutch-'collar on a;countershaft, in combination with a tight clutch-collar and a spur-wheelengaging a spur-wheel on the brake-shaft, substantially as specified.

3. The-reversing-shaft E, having threaded portions and traveling collarsthereon, in combination with a chainwhee1 loose thereon and havinglateral clutch-collars, a.chainconnec tion, and a chain-wheel on thebrake-shaft, substantially as speciiied.

4. A brakeshaft having an eccentric, in combination witha brake havingsprings, and an arm working in a bearing to prevent rotation,substantially as specied.

5. The combination,with the brake-shaft, of an eccentric brake, and abelt-shifter adapted to operate in connection with pulleys B, C, and D,and a belt running continuously in the same direction, substantially asspecified.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM C. ALSDORF.

